Add a Features section to the CLI page on the website

[stevenpav-helm]

I just took air for a spin, but could not find any information here, or on the post website, about how to actually call air from the command line. Moreover, calling

air --help

only tells me I need a COMMAND, but not the list of available commands. It was only after some searching through the docs that I found I could call

air format .

This is not immediately apparent from any of the docs.

[DavisVaughan]

<COMMAND> is followed by a Commands header, I am hopeful that is pretty clear about what you should call

[stevenpav-helm]

Hmm, thanks, I somehow missed that as well. I should say, the command line usage is not documented in the otherwise very good HTML documentation for this package. For example command line interface only details how to install the CLI tool, but not how to use it.

[DavisVaughan]

Ah yea we should probably add some more detail there, I think that makes sense